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Rule S2068: detect hard-coded passwords in web.config files #6182

Merged
merged 12 commits into from
Oct 12, 2022
Merged

Rule S2068: detect hard-coded passwords in web.config files #6182

merged 12 commits into from
Oct 12, 2022

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pavel-mikula-sonarsource
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Contributes to #5427

@pavel-mikula-sonarsource pavel-mikula-sonarsource marked this pull request as draft October 7, 2022 13:15
Base automatically changed from Pavel/RefactorParameters to master October 10, 2022 07:26
martin-strecker-sonarsource
martin-strecker-sonarsource requested changes Oct 10, 2022
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analyzers/src/SonarAnalyzer.Common/Rules/Hotspots/DoNotHardcodeCredentialsBase.cs Outdated Show resolved Hide resolved
analyzers/src/SonarAnalyzer.Common/Rules/Hotspots/DoNotHardcodeCredentialsBase.cs Outdated Show resolved Hide resolved
analyzers/src/SonarAnalyzer.Common/Rules/Hotspots/DoNotHardcodeCredentialsBase.cs Outdated Show resolved Hide resolved
analyzers/src/SonarAnalyzer.Common/Rules/Hotspots/DoNotHardcodeCredentialsBase.cs
const string UriPasswordSpecialCharacters = Rfc3986_Unreserved + Rfc3986_Pct + Rfc3986_SubDelims;
// See https://tools.ietf.org/html/rfc3986 Userinfo can contain groups: unreserved | pct-encoded | sub-delims
var uriUserInfoPart = @"[\w\d" + Regex.Escape(UriPasswordSpecialCharacters) + "]+";
uriUserInfoPattern = new Regex(@"\w+:\/\/(?<Login>" + uriUserInfoPart + "):(?<Password>" + uriUserInfoPart + ")@", RegexOptions.Compiled);
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According to rfc3986 more than one : is allowed in the userinfo. I assume, that the password group should also accept :.

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I don't understand the comment. Can you provide more detailed explanation?

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I did not really changed anything of this logic, I just moved it to different place

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I think this is a valid userinfo that does not match the regex:
https://user:passwordWith:isOkay@example.org/ This is how I read the grammar in the RFC, but I could be mistaken. At least .Net thinks so too sharplab.io

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We don't need to extract the full password. So changing it will make the regex more expensive, without affecting the results.

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The problem is that the : is not in the <Password> group and because of the trailing @, the regex doesn't match at all. The password group must be "[\w\d" + Regex.Escape(UriPasswordSpecialCharacters) + ":]+".

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I'll try in another PR

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See #6199

...s/tests/SonarAnalyzer.UnitTest/TestCases/WebConfig/DoNotHardcodeCredentials/Valid/Web.config Show resolved Hide resolved
...s/tests/SonarAnalyzer.UnitTest/TestCases/WebConfig/DoNotHardcodeCredentials/Valid/Web.config Show resolved Hide resolved
@pavel-mikula-sonarsource pavel-mikula-sonarsource marked this pull request as ready for review October 10, 2022 14:44
martin-strecker-sonarsource
martin-strecker-sonarsource reviewed Oct 11, 2022
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LGTM. The test for EF6 connection string should be updated to test the interesting case of an &quote; as a delimiter and there are some improvements for the RegEx possible or need a followup PR.

...s/tests/SonarAnalyzer.UnitTest/TestCases/WebConfig/DoNotHardcodeCredentials/Valid/Web.config Show resolved Hide resolved
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sonarcloud bot commented Oct 11, 2022

Kudos, SonarCloud Quality Gate passed!    Quality Gate passed

Bug A 0 Bugs
Vulnerability A 0 Vulnerabilities
Security Hotspot A 0 Security Hotspots
Code Smell A 0 Code Smells

No Coverage information No Coverage information
No Duplication information No Duplication information

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sonarcloud bot commented Oct 11, 2022

Kudos, SonarCloud Quality Gate passed!    Quality Gate passed

Bug A 0 Bugs
Vulnerability A 0 Vulnerabilities
Security Hotspot A 0 Security Hotspots
Code Smell A 0 Code Smells

100.0% 100.0% Coverage
0.0% 0.0% Duplication

@pavel-mikula-sonarsource pavel-mikula-sonarsource merged commit 19f6fdb into master Oct 12, 2022
@pavel-mikula-sonarsource pavel-mikula-sonarsource deleted the Pavel/S2068-webconfig branch October 12, 2022 06:45
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